Implement lift and ungear system



July 15, 1952 c. c. HAAS IMPLEMENT LIFT AND UNGEAR SYSTEM 5 Sheets-Sheet l Original Filed Oct. 25, 1946 July 5, 1952 c. c. HAAs IMPLEMENT LIFT AND UNGEAR SYSTEM 5 Sheets-Sheet 2 Original Filed Oct. 25, 1946 T n Jw m Ilm July l5, 1952 c. c. HAAs IMPLJEIVIENT- LIFT AND UNGEAR SYSTEM Original Filed Oct. 25, 1946 5 Sheets-Sheet 3 Patented July 15, 1952 2,603,172 IMPLEMENT LIFT Ann UNGEAR SYSTEM Clarence C. Haas, Richmond, Ind., assignor to International Harvester Company, a corporation of New Jersey Original application October 25, 1946, Serial No. 705,709. Divided and this application August 5, 1950, Serial N0. 177,920l

2 claims. (c1. 11i-67) Y This application is a division of United States application Serial No. 705,709, filed October 25, 1946.

An object of the invention is to provide an improved grain drill or the like, adapted to be pivotally connected to a tractor having a power lift, with means including a clutch for transmitting power from the tractor to drive dispensing mechanism of the drill and connections between the power lift and the drill and clutch, respectively, for disconnecting the clutch when the drill is lifted for transport Other objects and advantages will become clear from the following detailed description when read in conjunction with the accompanying drawings, wherein:

Figure l is a view in side elevation of the rear portionl of a tractor with one wheel removed, showing a grain drill embodying the features of the present invention attached thereto and is a partial section taken on the line I-I of Figure 2;

Figure 2 is a plan view of the structure shown in Figure l, the tractor being indicated in dotted lines to illustrate the attachment of the implement thereto;

Figure 3 is an enlarged detail of the drive transmission mechanism and throw-out mounted on the implement hitch structure;

Figure 4 is a section taken on the line 4--4 of Figure 2.

Figure 5 is a detail showing the connection ofthe hitch structure to the implement frame; and

Figure 6 is a section on the line 6 6 of Figure 5.

Referring to the drawings, the hitch and planter drive structure of the present invention is illustrated in its application to a grain drill such as is shown and described in copending application Serial No. 705,630, led October 25, 1946. The drill is mounted upon a .tractor having a longitudinally extending laterally offset body I0, a rear axle structure I I and laterally spaced rear drive wheels I2. The tractor is likewise provided with conventional steering mechanism I 3 and an operators station I4.

The grain drill is adapted to be directly connected to the tractor to be transported thereupon and comprises a transversely extending grain box I5 having at each end thereof a depending plate or frame piece I6. The plate I6 is generally triangular in shape and is secured at its forward lower end to a transversely extending hollow frame bar I1. The open ends of transverse frame bar II provide a bearing for the mounting of a crank axle I8 having a transverse portion I9 rotatably received in the bar, a

2 downwardly and rearwardly extending portion 20, and a laterally extending portion 2l upon which is mounted a wheel 22.

The grain drill is provided with seed depositing mechanism generally indicated at 23 and is carried upon supporting wheels 22.

The hitch structure by which the grain drill is attached in draft receiving relation to the tractor comprises a U-shaped member generally indicated at 25 and comprising laterally spaced longitudinally extending tubular members 26. The members 26 converge forwardly and are braced near their forward ends by a cross-piece 2l. The rear ends of the members 26 are each received in a socket member shown in Figure 5 and comprising a base portion 28 affixed to the transverse frame bar Il. Each of the members 2S has secured thereto at longitudinally spaced locations sleeve or socket members 29 and 30 adapted to receive the rear end of the member 25. The rear socket member 29 as shown in section in Figure 6 is provided with 'an opening to receive a pin 3i adapted to register with a corresponding opening in the tubular member 26, Thefcrward ends of the beams 26 are bifurcated to receive therebetween the rearwardly bent arms of a clevis 32. Each beam 26 is connected to the clevis by a pivot pin 33 providing a transverse axis for vertical swinging movement of the hitch structure. Clevis 32 forms a part of the hitch structure and extends transversely between the ends thereof. Forwardly extending lips 34 are provided on the clevis for connection to the draw-bar 35 of the tractor by means of a pivot pin 36. Draw-bar 35 is U-shaped and is connected to depending axle housings 31 of the tractor by bolts 38. The connection of the clevis 32 tov the draw-bar 35 provides a vertical pivot to accommodate lateral swinging of the hitch structure 25 and therefore of the implement of which the hitch structure forms a part.

The grain drill of the present invention is provided with conventional seed dispensing mechanism by which material is deposited in the furrows formed by the opening disks. The seed dispensing mechanism is driven from the tractor by mechanism which includes a telescoping drive shaft 39 which comprises a sleeve member 40 and a shaft member 4I. Shaft member 4I is connected by a universal joint 42 to a coupling member 43 affixed to a stub axle 44 of the tractor by means of a removable pin 45 passed through the coupling 43 `and the axle 44. Stub axlev 44 receives its power from the operation of the tractor wheels. Sleeve member 40 of the telescoping shaft 39 is connected by a universal joint 48 to a shaft 4l journaled upon a U-shaped bracket 48 secured to the right-hand beam 28 of the hitch structure 25.

Shaft 4l has mounted thereupon a sprocket wheel 49 which is connected by a chain 50 with a sprocket wheel mounted upon a shaft 52 journaled on a bracket 53 affixed to transverse frame bar il of the grain drill. vided with an additional sprocket wheel 54 which is connected by a chain 55 and suitable gearing to drive the seed and fertilizer shafts, not shown, of the grain drill. lt will thus be clear that drive is transmitted from the tractor to drive the dispensing mechanism of the implement through the stub axle 44 of the tractor, vtelescoping shaft 39, sprocket 139, and the chains 50 and 55. It will likewise be noted that the telescoping shaft 38 extends transversely of the tractor substantially in line with the axis of the tractor rear wheelsvand near the points of pivotal connection of the hitch structure to the tractor, so that upon swinging of the implement horizontally or vertically about its pivots upon the tractor, drive may be transmittedk from the trac tor to the grain drill during such pivoting.

The grain drill is lifted upon the tractor for transport by means of lifting structure including a pair of laterally spaced rods vfifi connected to the transverse frame bar il. rlhe upper end of each of the rods 55 is slidably received in a swivel member 5'! pivotally mounted at the end of a lift arm 58. Each of the lift arms 5S extends rearwardly from the tractor and is secured at its forward end upon a rock-shaft 59, the ends of which are rotatably mounted in bearings 68 secured to fenders 8| of the tractor at opposite sides of the cperators station le. A lever 82 is likewise fastened to the left-hand end of the rock-shaft 59 and is pivotally connected at its upper end by a connecting rod 83 with a rock-arm 84 mounted upon a rock-shaft 65 carried by the tractor body. Rock-shaft 85 is rocked by power derived from the tractor pov-'fer plant and preferably through the intermediary of a hydraulic cylinder and piston unit indicated at 85. The upper end of each of the rods :E8 is provided with an adjustable collari which abuts the swivel 5l upon rocking the arm 84 to lift the grain drill and to accommodate acertain amount of floating movement of the implement in operating position.

Upon lifting the grain drill to transport position, it is not desirable that the seed and fertilizer distributing mechanisms continue to operate. .e throw-out clutch is therefore provided and is shown in Figure 4. This throw-out vclutch cor prises a toothed member E8 splined to the shaft il and engageable with a toothed hub portion 88 of the sprocket wheel d8. Toolshed member 68 is provided with a radially projecting shoulder portion and mounted upon the member 88 on opposite-sides of the shouiderporticn are collars 'li and Collar l has laterally bent portions receivable in recesses in the collar 12. .il projection 'fl extends radially outwardly from a cani member 'f5 having teeth therein engage- Shaft 52 is promembers 15 and 'I3 into engagement. Rotation of the camming member '|5 is accomplished by mechanism including a link connected with the projection I4 and with a rock-arm 8| secured to the right-hand end of the rock-shaft 66. Upon movement of the arm 8|, therefore, motion is transmitted through the link 80 to rock the movable camming member 75 and disengage the clutch parts 68 and 69, thus interrupting the drive between the tractor and the movingr parts of the grain drill. Since the arm 8| is affixed to the same rock-shaft as the rock-arm 84, whenever the rock-shaft 65 is actuated to raise the grain drill to transport position upon the tractor, the arm 8| likewise is rocked in the same direction, and the link 88 by virtue of its connection'to the throw-out clutch disengages the drive.

rIIhe hitch structure of the present invention is very readily connected to and disconnected from the traitor and facilitates the attachment and detachment of the entire implement. The imp-lement may be disconnected by simply removing the pin 36 by which the clevis 32 is connected to the draw-bar of the tractor, then disconnecting the rods 56 and separating the telescoping parts 39, or by disconnecting the shaft 4I from the Stub axle 44. This is accomplished by removing pin 45 which connects the coupling 43 with the stub axle. It will be noted in Figure 2 that the pin 45 is partially covered by a collar member 82 slidable axially thereupon. Collar 82 is provided with a reduced portion 83 to which is secured one end of a coil spring 84, the other end of which abuts against a collar 85 secured to the shaft 4| beyond the universal joint 42. The spring 84 thus bridges the universal joint 42 for a purpose which will hereafter become clear. The collar 82 is notched at 86 and engages a projection 81 on the coupling 43. Collar 82 is held against the projection 87 by the action of the coil spring 84. The notch 86 in the collar functions as a cam in engagement with the pro jection 3'! of the coupling, and upon rotation of the collar the projection 8l will ride upon the outer rim thereof and the collar will back away from the pin 45 to accommodate its withdrawal.

The operator 0f the tract/or then is able lo drive away from the implement. As frequently happens, the operator in disconnecting the implement from the tractor fails to or does not wish to disconnect the portion 4| of the telescoping shaft from the stub axle, in which case he will drive olf leaving the shaft portion 4| extending outwardly laterally frorn the stub axle. As long as the tractor is in operation and the wheels are moving, of course, the shaft 4| will continue to revolve. ln such case, if, in the absence of the spring S4 shaft 4| should buckle with respect to stub shaft 44 and hang downward, considerable damage would be done to the tractor and to the shaftll. However, 'the spring 84 extending to opposite sides of the universal joint serves to prevent the shaft 4| from pivoting and holds, it in a substantially horizontal position.

The telescoping shaft 39 and the universal joints 42 and 4S permit operation of the grain drill seed and fertilizer drive mechanism during pivoting of the implement about its connection to the tractor. The lateral swinging of the implenient, however, is preferably limited, andA this is accomplished by the provision of bolts 88 threaded for reception in threaded openings in the clevis 32 at opposite sides of the vertical pivot pin 36. Theheads of these bolts are adapted to engage the draw-bar 35 upon the lateral swinging of the implement, and adjustment may be made therein by manipulating nuts 89.

It is believed that the operation of the grain drill and of the hitch structure of the present invention will be clearly understood from the foregoing description. Modifications may be made, however, in the arrangement and number of parts without departing from the spirit of the invention or the scope of the appended claims.

What is claimed is:

1. The combination with a tractor having a transverse rear axle and rear drive wheels, of an implement such as a grain drill or the like, having a driven part, comprising a transverse frame, supporting wheels on the frame, power lift means on the tractor including a rock-shaft, a rockarm at each end of the shaft, connecting means between one said rock-arm and said frame structure to raise the implement to transport position, a hitch point on the tractor, a draft structure mounted upon the frame and connected to the tractor at said hitch point upon vertical and horizontal pivots for lateral and vertical swinging with respect thereto, drive transmission means carried by the draft structure at a location adjacent said pivots, said transmission means including a clutch comprising a driving element, a driven element and disengaging means therefor, means transmitting drive from the driven element to the implement driven part, means for driving the driving element from the tractor, and connecting means between the other said rockarm and the clutch disengaging means for actuating the latter upon operation of the said power lift means.

2. The combination with a tractor having a transverse rear axle and rear drive wheels, of an implement such as a grain drill or the like, having a driven part, comprising a transverse frame, supporting Wheels on the frame, power lift means on the tractor including a rock-shaft, a rockarm at each end of the shaft, connecting means between one said rock-arm and said frame structure to raise the implement to transport position, a hitch point on the tractor, a draft structure mounted upon the frame and connected to the tractor at said hitch point upon vertical and horizontal pivots for lateral and vertical swinging with respect thereto, drive transmission means carried by the draft structure at a location adjacent saidvpivots, said transmission means including a clutch comprising a driving element, a driven element and disengaging means therefor, means transmitting drive from the driven element to the implement driven part, means for driving the driving element from the tractor, and linkmeans pivotally connecting the other said rock-arm and the clutch disengaging means and operable in any operating position of the implement to actuate the clutch disengaging means upon operation of the said power lift means.

CLARENCE C. HAAS.

` REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,405,001 Reichelt Jan. 31, 1922 1,864,122 Cole June 21, 1932 2,209,029 Kriegbaum et a1. July 23, 1940 2,351,078 Silver June 13, 1944 

